last_free         682 event/ngx_event_pipe.c     ngx_chain_t  *cl, *tl, *next, *out, **ll, **last_free, fl;
last_free         745 event/ngx_event_pipe.c     for (last_free = &p->free_raw_bufs;
last_free         746 event/ngx_event_pipe.c          *last_free != NULL;
last_free         747 event/ngx_event_pipe.c          last_free = &(*last_free)->next)
last_free         788 event/ngx_event_pipe.c             *last_free = tl;
last_free         789 event/ngx_event_pipe.c             last_free = &tl->next;